CN210803850U - Optical imaging lens - Google Patents
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- CN210803850U CN210803850U CN201921280484.4U CN201921280484U CN210803850U CN 210803850 U CN210803850 U CN 210803850U CN 201921280484 U CN201921280484 U CN 201921280484U CN 210803850 U CN210803850 U CN 210803850U
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Abstract
The utility model provides an optical imaging lens includes from the thing side to picture side in proper order: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a positive optical power; a fourth lens having an optical power; a fifth lens having optical power; the sixth lens with focal power, the object-side surface of the sixth lens is a convex surface, and the image-side surface of the sixth lens is a concave surface; the seventh lens with negative focal power, the image side surface of the seventh lens is a concave surface; the entrance pupil diameter EPD of the optical imaging lens and the effective focal length f of the optical imaging lens meet 1.4 < f/EPD < 1.98, and the air interval T23 between the second lens and the third lens on the optical axis and the air interval T34 between the third lens and the fourth lens on the optical axis meet 0.1 < T23/T34 < 0.3. The utility model provides an optical imaging lens have the unstable problem of formation of image effect among the prior art.
Description
Technical Field
The utility model relates to an optical lens imaging technology field particularly, relates to an optical imaging lens.
Background
With the rapid change of intelligent electronic products, people have increasingly increased demands for the photographing function of products such as smart phones and tablet computers. The development trend of miniaturization and ultra-thinning of the intelligent electronic product market promotes the new revolution of the optical imaging lens, and the problem that how to obtain higher imaging quality in different environments becomes a lens designer to be solved urgently is solved in addition to meeting the miniaturization requirement.
Based on there is the unstable problem of imaging effect in the optical imaging camera lens among the prior art, the utility model provides an optical imaging camera lens of large aperture, ultra-thin, imaging quality is good, can satisfy the miniaturized demand of intelligent electronic product.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide an optical imaging lens, which solves the problem of unstable imaging effect of the optical imaging lens in the prior art.
In order to achieve the above object, according to an aspect of the present invention, there is provided an optical imaging lens including, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a positive optical power; a fourth lens having an optical power; a fifth lens having optical power; the sixth lens with focal power, the object-side surface of the sixth lens is a convex surface, and the image-side surface of the sixth lens is a concave surface; the seventh lens with negative focal power, the image side surface of the seventh lens is a concave surface; the entrance pupil diameter EPD of the optical imaging lens and the effective focal length f of the optical imaging lens meet 1.4 < f/EPD < 1.98, and the air interval T23 between the second lens and the third lens on the optical axis and the air interval T34 between the third lens and the fourth lens on the optical axis meet 0.1 < T23/T34 < 0.3.
Further, a radius of curvature R11 of the object-side surface of the sixth lens and an effective focal length f3 of the third lens satisfy 0.1 < R11/f3 < 0.5.
Further, 1 < f2/f7 < 1.6 is satisfied between the effective focal length f2 of the second lens and the effective focal length f7 of the seventh lens.
Further, the radius of curvature R12 of the image side surface of the sixth lens and the radius of curvature R11 of the object side surface of the sixth lens satisfy 0 < (R12-R11)/(R12+ R11) < 0.5.
Further, the sum of the central thicknesses of the first lens to the seventh lens on the optical axis Σ CT, and the distance TD between the object-side surface of the first lens and the image-side surface of the seventh lens on the optical axis satisfies 0.3 < Σct/TD < 0.8.
Further, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R14 of the image side surface of the seventh lens meet 0.9 < R11/R14 < 1.5.
Further, the on-axis distance between the intersection point of the object side surface of the first lens and the optical axis and the effective radius vertex of the object side surface of the first lens is SAG11, the edge thickness of the first lens is ET1, and 3 < SAG11/ET1 < 3.6 is satisfied between SAG11 and ET 1.
Further, a center thickness CT6 of the sixth lens on the optical axis, an air interval T67 of the sixth lens and the seventh lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis satisfy 0.1 < CT6/(T67+ CT7) < 0.6.
Further, 1.3 < (f/f1) + (f/f3) < 2 is satisfied among the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens.
Further, a sum Σ AT of air intervals on the optical axis between any adjacent two lenses of the first lens to the seventh lens and an entrance pupil diameter EPD of the optical imaging lens satisfy 0.9 < EPD/Σ AT < 1.6.
According to another aspect of the present invention, there is provided an optical imaging lens, comprising in order from an object side to an image side: a first lens having a positive optical power; a second lens having an optical power; a third lens having a positive optical power; a fourth lens having an optical power; a fifth lens having optical power; a sixth lens having optical power; the seventh lens with negative focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; the distance SAG71 on the optical axis between the intersection point of the object side surface of the seventh lens and the optical axis and the effective radius vertex of the object side surface of the seventh lens, the air interval T67 on the optical axis between the sixth lens and the seventh lens, and the half Img of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lensH satisfies 0.04 < | SAG 71T 67|/ImgH2＜0.09。
Further, the diameter EPD of the entrance pupil of the optical imaging lens and the effective focal length f of the optical imaging lens satisfy 1.4 < f/EPD < 1.98.
Further, an air interval T23 between the second lens and the third lens on the optical axis and an air interval T34 between the third lens and the fourth lens on the optical axis satisfy 0.1 < T23/T34 < 0.3.
Further, a radius of curvature R11 of the object-side surface of the sixth lens and an effective focal length f3 of the third lens satisfy 0.1 < R11/f3 < 0.5.
Further, 1 < f2/f7 < 1.6 is satisfied between the effective focal length f2 of the second lens and the effective focal length f7 of the seventh lens.
Further, the radius of curvature R12 of the image side surface of the sixth lens and the radius of curvature R11 of the object side surface of the sixth lens satisfy 0 < (R12-R11)/(R12+ R11) < 0.5.
Further, the sum of the central thicknesses of the first lens to the seventh lens on the optical axis Σ CT, and the distance TD between the object-side surface of the first lens and the image-side surface of the seventh lens on the optical axis satisfies 0.3 < Σct/TD < 0.8.
Further, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R14 of the image side surface of the seventh lens meet 0.9 < R11/R14 < 1.5.
Further, the on-axis distance between the intersection point of the object side surface of the first lens and the optical axis and the effective radius vertex of the object side surface of the first lens is SAG11, the edge thickness of the first lens is ET1, and 3 < SAG11/ET1 < 3.6 is satisfied between SAG11 and ET 1.
Further, a center thickness CT6 of the sixth lens on the optical axis, an air interval T67 of the sixth lens and the seventh lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis satisfy 0.1 < CT6/(T67+ CT7) < 0.6.
Further, 1.3 < (f/f1) + (f/f3) < 2 is satisfied among the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens.
Further, a sum Σ AT of air intervals on the optical axis between any adjacent two lenses of the first lens to the seventh lens and an entrance pupil diameter EPD of the optical imaging lens satisfy 0.9 < EPD/Σ AT < 1.6.
Use the technical scheme of the utility model, optical imaging lens includes from the thing side to picture side in proper order: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a positive optical power; a fourth lens having an optical power; a fifth lens having optical power; the sixth lens with focal power, the object-side surface of the sixth lens is a convex surface, and the image-side surface of the sixth lens is a concave surface; the seventh lens with negative focal power, the image side surface of the seventh lens is a concave surface; the entrance pupil diameter EPD of the optical imaging lens and the effective focal length f of the optical imaging lens meet 1.4 < f/EPD < 1.98, and the air interval T23 between the second lens and the third lens on the optical axis and the air interval T34 between the third lens and the fourth lens on the optical axis meet 0.1 < T23/T34 < 0.3.
Through the rational arrangement of shape of face, focal power, can realize that bigger aperture increases the light inlet quantity under the prerequisite of compression lens overall dimension and assurance normal volume production yield to effectual balance control system's low order aberration, and then make and obtain higher imaging quality under different environment, increased the stability of imaging effect. Through the reasonable control of medium thickness for can set up the diaphragm between third lens and fourth lens, and realize the increase in aperture, the design of large aperture can acquire more light inlet volume, reduces optical aberration when light is not enough, promotes the image acquisition quality, acquires stable formation of image effect.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an optical imaging lens according to a first example of the present invention; and
fig. 2 shows on-axis chromatic aberration curves of the optical imaging lens in fig. 1;
fig. 3 shows an astigmatism curve of the optical imaging lens in fig. 1;
FIG. 4 shows distortion curves of the optical imaging lens of FIG. 1;
fig. 5 shows a chromatic aberration of magnification curve of the optical imaging lens in fig. 1;
fig. 6 is a schematic structural diagram of an optical imaging lens according to example two of the present invention;
fig. 7 shows on-axis chromatic aberration curves of the optical imaging lens in fig. 6;
fig. 8 illustrates an astigmatism curve of the optical imaging lens in fig. 6;
fig. 9 shows distortion curves of the optical imaging lens in fig. 6;
fig. 10 shows a chromatic aberration of magnification curve of the optical imaging lens in fig. 6;
fig. 11 is a schematic structural diagram of an optical imaging lens according to a third example of the present invention;
fig. 12 shows on-axis chromatic aberration curves of the optical imaging lens in fig. 11;
fig. 13 shows an astigmatism curve of the optical imaging lens in fig. 11;
fig. 14 shows distortion curves of the optical imaging lens in fig. 11;
fig. 15 shows a chromatic aberration of magnification curve of the optical imaging lens in fig. 11;
fig. 16 is a schematic structural view of an optical imaging lens according to example four of the present invention;
fig. 17 shows on-axis chromatic aberration curves of the optical imaging lens in fig. 16;
fig. 18 shows an astigmatism curve of the optical imaging lens in fig. 16;
fig. 19 shows distortion curves of the optical imaging lens in fig. 16;
fig. 20 shows a chromatic aberration of magnification curve of the optical imaging lens in fig. 16;
fig. 21 is a schematic structural view of an optical imaging lens according to example five of the present invention;
fig. 22 shows on-axis chromatic aberration curves of the optical imaging lens in fig. 21;
fig. 23 shows an astigmatism curve of the optical imaging lens in fig. 21;
fig. 24 shows distortion curves of the optical imaging lens in fig. 21;
fig. 25 shows a chromatic aberration of magnification curve of the optical imaging lens in fig. 21;
fig. 26 is a schematic structural view of an optical imaging lens according to example six of the present invention;
fig. 27 shows on-axis chromatic aberration curves of the optical imaging lens in fig. 26;
fig. 28 shows an astigmatism curve of the optical imaging lens in fig. 26;
fig. 29 shows distortion curves of the optical imaging lens in fig. 26;
fig. 30 shows a chromatic aberration of magnification curve of the optical imaging lens in fig. 26.
E1, first lens; e2, second lens; e3, third lens; e4, fourth lens; e5, fifth lens; e6, sixth lens; e7, seventh lens; e8, a filter plate; s1, the object side surface of the first lens; s2, the image side surface of the first lens; s3, a second lens object side; s4, the image side surface of the second lens; s5, the third lens object side; s6, the third lens image-side surface; s7, fourth lens object side; s8, the fourth lens image side surface; s9, the fifth lens object-side surface; s10, the image side surface of the fifth lens; s11, the sixth lens object side; s12, the sixth lens image-side surface; s13, seventh lens object side; s14, the seventh lens image side surface; s15, filtering the side surface of the filter; s16, filtering the image side surface of the filter; s17, imaging surface; STO, stop.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens close to the object side becomes the object side surface of the lens, and the surface of each lens close to the image side is called the image side surface of the lens. The determination of the surface shape in the paraxial region can be performed by determining whether or not the surface shape is concave or convex, based on the R value (R denotes the radius of curvature of the paraxial region, and usually denotes the R value in a lens database (lens data) in optical software) in accordance with the determination method of a person ordinarily skilled in the art. For the object side surface, when the R value is positive, the object side surface is judged to be convex, and when the R value is negative, the object side surface is judged to be concave; in the case of the image side surface, the image side surface is determined to be concave when the R value is positive, and is determined to be convex when the R value is negative.
In order to solve the unstable problem of imaging effect of optical imaging camera lens among the prior art, the utility model provides an optical imaging camera lens.
Example one
As shown in fig. 1 to 30, the optical imaging lens includes, in order from an object side to an image side: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a positive optical power; a fourth lens having an optical power; a fifth lens having optical power; the sixth lens with focal power, the object-side surface of the sixth lens is a convex surface, and the image-side surface of the sixth lens is a concave surface; the seventh lens with negative focal power, the image side surface of the seventh lens is a concave surface; the entrance pupil diameter EPD of the optical imaging lens and the effective focal length f of the optical imaging lens meet 1.4 < f/EPD < 1.98, and the air interval T23 between the second lens and the third lens on the optical axis and the air interval T34 between the third lens and the fourth lens on the optical axis meet 0.1 < T23/T34 < 0.3.
Through the rational arrangement of shape of face, focal power, can realize that bigger aperture increases the light inlet quantity under the prerequisite of compression lens overall dimension and assurance normal volume production yield to effectual balance control system's low order aberration, and then make and obtain higher imaging quality under different environment, increased the stability of imaging effect. Through the reasonable control of medium thickness for can set up the diaphragm between third lens and fourth lens, and realize the increase in aperture, the design of large aperture can acquire more light inlet volume, reduces optical aberration when light is not enough, promotes the image acquisition quality, acquires stable formation of image effect.
The thickness is a thickness between lenses between the first lens and the seventh lens.
In the present embodiment, 0.1 < R11/f3 < 0.5 is satisfied between the radius of curvature R11 of the object-side surface of the sixth lens and the effective focal length f3 of the third lens. The optical sensitivities of the third lens and the sixth lens are reduced by reasonably controlling the curvature radius of the object side surface of the sixth lens and the effective focal length of the third lens, so that the aberration in the range is reduced, and the imaging quality is improved.
In the present embodiment, 1 < f2/f7 < 1.6 is satisfied between the effective focal length f2 of the second lens and the effective focal length f7 of the seventh lens. The spherical aberration is controlled within a reasonable range by reasonably controlling the ratio of the effective focal length of the second lens to the effective focal length of the seventh lens, so that a better imaging effect is achieved.
In the present embodiment, 0 < (R12-R11)/(R12+ R11) < 0.5 is satisfied between the radius of curvature R12 of the image-side surface of the sixth lens and the radius of curvature R11 of the object-side surface of the sixth lens. By controlling the curvature radius of the object side surface of the sixth lens and the curvature radius of the image side surface of the sixth lens, the optical imaging lens can be prevented from generating an overlarge incident angle, and meanwhile, the range of the focal power of the optical imaging lens can be restrained to reduce coma.
In the present embodiment, the sum Σ CT of the center thicknesses on the optical axis of the first lens to the seventh lens, and the distance TD on the optical axis between the object-side surface of the first lens and the image-side surface of the seventh lens satisfy 0.3 < Σct/TD < 0.8. The arrangement enables the thickness of each lens to be within a reasonable range relative to the length of the optical imaging lens, so that the size of the optical imaging lens is reduced, the manufacturing difficulty of the lens is reduced, and the optical imaging lens can achieve better compromise.
In the embodiment, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R14 of the image side surface of the seventh lens satisfy 0.9 < R11/R14 < 1.5. By controlling the radii of curvature of the object-side surface of the sixth lens and the image-side surface of the seventh lens, the optical sensitivities of the sixth lens and the seventh lens can be reduced.
In the embodiment, the on-axis distance from the intersection point of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens is SAG11, the edge thickness of the first lens is ET1, and 3 < SAG11/ET1 < 3.6 is satisfied between SAG11 and ET 1. The first lens is easy to assemble on the lens barrel by limiting the reasonable range of the rise and the edge thickness of the object side surface of the first lens and increasing the mass producibility of the first lens.
In the present embodiment, 0.1 < CT6/(T67+ CT7) < 0.6 is satisfied between the center thickness CT6 of the sixth lens on the optical axis, the air interval T67 of the sixth lens and the seventh lens on the optical axis, and the center thickness CT7 of the seventh lens on the optical axis. By reasonably controlling the central thickness of the sixth lens, the air interval of the sixth lens and the seventh lens on the optical axis and the central thickness of the seventh lens on the optical axis within a reasonable range, the two lenses are ensured not to be too thin so as to influence production, and meanwhile, the total length of the optical imaging lens is prevented from exceeding the manufacturing limit.
In the present embodiment, 1.3 < (f/f1) + (f/f3) < 2 is satisfied between the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens. The contribution of the effective focal length of the first lens and the effective focal length of the third lens to the focal length of the whole optical imaging system is reasonably distributed, so that the spherical aberration and the field curvature of the first lens and the third lens are favorably reduced.
In the present embodiment, a sum Σ AT of air intervals on the optical axis between any adjacent two lenses of the first lens to the seventh lens and an entrance pupil diameter EPD of the optical imaging lens satisfy 0.9 < EPD/Σ AT < 1.6. The total length of the air space is reasonably restricted, so that the lens structure is more compact, and the effective focal length and the total length of the optical imaging lens are still in a reasonable range while the large aperture is realized.
Example two
The optical imaging lens sequentially comprises from an object side to an image side: a first lens having a positive optical power; a second lens having an optical power; a third lens having a positive optical power; a fourth lens having an optical power; a fifth lens having optical power; a sixth lens having optical power; the seventh lens with negative focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface; wherein a distance SAG71 on the optical axis between the intersection point of the object side surface of the seventh lens and the optical axis and the effective radius vertex of the object side surface of the seventh lens, an air interval T67 on the optical axis between the sixth lens and the seventh lens, and a half ImgH of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens satisfy 0.04 < | SAG71 | T67|/ImgH2＜0.09。
Through the reasonable arrangement of surface shape and focal power, the light inlet quantity can be increased by a larger aperture on the premise of compressing the whole size of the lens and ensuring the yield of normal mass production, and the low-order aberration of the system is effectively balanced and controlled. By defining the rise of the object side of the seventh lens, the ratio of the air space between the sixth lens and the seventh lens relative to the image height, the seventh lens is easier to machine and the overall length of the optical imaging lens can be reduced accordingly.
1.4 < f/EPD < 1.98 is satisfied between the entrance pupil diameter EPD of the optical imaging lens and the effective focal length f of the optical imaging lens, and 0.1 < T23/T34 < 0.3 is satisfied between the air space T23 on the optical axis between the second lens and the third lens and the air space T34 on the optical axis between the third lens and the fourth lens. Through the reasonable control of medium thickness for can set up the diaphragm between third lens and fourth lens, and realize the increase in aperture, the design of large aperture can acquire more light inlet volume, reduces optical aberration when light is not enough, promotes the image acquisition quality, acquires stable formation of image effect.
In the present embodiment, 0.1 < R11/f3 < 0.5 is satisfied between the radius of curvature R11 of the object-side surface of the sixth lens and the effective focal length f3 of the third lens. The optical sensitivities of the third lens and the sixth lens are reduced by reasonably controlling the curvature radius of the object side surface of the sixth lens and the effective focal length of the third lens, so that the aberration in the range is reduced, and the imaging quality is improved.
In the present embodiment, 1 < f2/f7 < 1.6 is satisfied between the effective focal length f2 of the second lens and the effective focal length f7 of the seventh lens. The spherical aberration is controlled within a reasonable range by reasonably controlling the ratio of the effective focal length of the second lens to the effective focal length of the seventh lens, so that a better imaging effect is achieved.
In the present embodiment, 0 < (R12-R11)/(R12+ R11) < 0.5 is satisfied between the radius of curvature R12 of the image-side surface of the sixth lens and the radius of curvature R11 of the object-side surface of the sixth lens. By controlling the curvature radius of the object side surface of the sixth lens and the curvature radius of the image side surface of the sixth lens, the optical imaging lens can be prevented from generating an overlarge incident angle, and meanwhile, the range of the focal power of the optical imaging lens can be restrained to reduce coma.
In the present embodiment, the sum Σ CT of the center thicknesses on the optical axis of the first lens to the seventh lens, and the distance TD on the optical axis between the object-side surface of the first lens and the image-side surface of the seventh lens satisfy 0.3 < Σct/TD < 0.8. The arrangement enables the thickness of each lens to be within a reasonable range relative to the length of the optical imaging lens, so that the size of the optical imaging lens is reduced, the manufacturing difficulty of the lens is reduced, and the optical imaging lens can achieve better compromise.
In the embodiment, the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R14 of the image side surface of the seventh lens satisfy 0.9 < R11/R14 < 1.5. By controlling the radii of curvature of the object-side surface of the sixth lens and the image-side surface of the seventh lens, the optical sensitivities of the sixth lens and the seventh lens can be reduced.
In the embodiment, the on-axis distance from the intersection point of the object side surface of the first lens and the optical axis to the vertex of the effective radius of the object side surface of the first lens is SAG11, the edge thickness of the first lens is ET1, and 3 < SAG11/ET1 < 3.6 is satisfied between SAG11 and ET 1. The first lens is easy to assemble on the lens barrel by limiting the reasonable range of the rise and the edge thickness of the object side surface of the first lens and increasing the mass producibility of the first lens.
In the present embodiment, 0.1 < CT6/(T67+ CT7) < 0.6 is satisfied between the center thickness CT6 of the sixth lens on the optical axis, the air interval T67 of the sixth lens and the seventh lens on the optical axis, and the center thickness CT7 of the seventh lens on the optical axis. By reasonably controlling the central thickness of the sixth lens, the air interval of the sixth lens and the seventh lens on the optical axis and the central thickness of the seventh lens on the optical axis within a reasonable range, the two lenses are ensured not to be too thin so as to influence production, and meanwhile, the total length of the optical imaging lens is prevented from exceeding the manufacturing limit.
In the present embodiment, 1.3 < (f/f1) + (f/f3) < 2 is satisfied between the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens, and the effective focal length f3 of the third lens. The contribution of the effective focal length of the first lens and the effective focal length of the third lens to the focal length of the whole optical imaging system is reasonably distributed, so that the spherical aberration and the field curvature of the first lens and the third lens are favorably reduced.
In the present embodiment, a sum Σ AT of air intervals on the optical axis between any adjacent two lenses of the first lens to the seventh lens and an entrance pupil diameter EPD of the optical imaging lens satisfy 0.9 < EPD/Σ AT < 1.6. The total length of the air space is reasonably restricted, so that the lens structure is more compact, and the effective focal length and the total length of the optical imaging lens are still in a reasonable range while the large aperture is realized.
The optical imaging lens can also comprise at least one diaphragm so as to improve the imaging quality of the lens. Alternatively, the stop may be disposed between the third lens image side surface and the fourth lens object side surface. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.
The optical imaging lens in the present application may employ a plurality of lenses, such as the seven lenses described above. By reasonably distributing the focal power, the surface shape, the central thickness of each lens, the on-axis distance between each lens and the like, the aperture of the optical imaging lens can be effectively increased, the sensitivity of the lens is reduced, and the machinability of the lens is improved, so that the optical imaging lens is more beneficial to production and processing and can be suitable for portable electronic equipment such as smart phones. The optical imaging lens also has the advantages of large aperture, ultra-thin and good imaging quality, and can meet the miniaturization requirement of intelligent electronic products. In addition, the design of large aperture can acquire more light incident volumes, reduces optical aberration when light is not enough, promotes the image acquisition quality, acquires stable formation of image effect.
In the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.
However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although seven lenses are exemplified in the embodiment, the optical imaging lens is not limited to include seven lenses. The optical imaging lens may also include other numbers of lenses, as desired.
Examples of specific surface types and parameters applicable to the optical imaging lens of the above-described embodiment are further described below with reference to the drawings.
It should be noted that any one of the following examples one to six is applicable to all embodiments of the present application.
Example one
As shown in fig. 1, the optical imaging lens sequentially includes, from an object side to an image side along an optical axis: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a diaphragm STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.
The first lens E1 has positive focal power, the first lens object-side surface S1 is convex, and the first lens image-side surface S2 is concave; the second lens E2 has negative power, the second lens object-side surface S3 is convex, and the second lens image-side surface S4 is concave; the third lens E3 has positive focal power, the third lens object-side surface S5 is convex, and the third lens image-side surface S6 is convex; the fourth lens element E4 has negative power, the fourth lens element object-side surface S7 is concave, and the fourth lens element image-side surface S8 is concave; the fifth lens element E5 has negative power, the fifth lens element object-side surface S9 is concave, and the fifth lens element image-side surface S10 is convex; the sixth lens element E6 has positive refractive power, the sixth lens element object-side surface S11 is convex, and the sixth lens element image-side surface S12 is concave; the seventh lens element E7 has negative power, the seventh lens object-side surface S13 is convex, and the seventh lens image-side surface S14 is concave. Filter E8 has a filter object side S15 and a filter image side S16. The light from the object passes through the surfaces in sequence and is finally imaged on the imaging plane S17.
Table one shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example one, where the radius of curvature and the thickness are both in millimeters.
Table one: example one detailed optical data for each lens (where OBJ denotes the source face)
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | All-round | All-round | ||
| S1 | Aspherical surface | 1.9259 | 0.5520 | 1.54/56.2 | -0.0457 |
| S2 | Aspherical surface | 6.9336 | 0.1000 | 1.3666 | |
| S3 | Aspherical surface | 2.7331 | 0.1621 | 1.64/23.5 | -0.9032 |
| S4 | Aspherical surface | 1.5271 | 0.1852 | -0.9028 | |
| S5 | Aspherical surface | 2.6090 | 0.3808 | 1.54/56.1 | -30.5998 |
| S6 | Aspherical surface | -72.2411 | 0.1002 | -95.0000 | |
| STO | Spherical surface | All-round | 0.5491 | ||
| S7 | Aspherical surface | -52.0007 | 0.3058 | 1.66/20.4 | 50.0000 |
| S8 | Aspherical surface | 17.0938 | 0.2660 | 13.6404 | |
| S9 | Aspherical surface | -5.7011 | 0.3288 | 1.64/23.5 | -7.8192 |
| S10 | Aspherical surface | -7.2143 | 0.1228 | -35.3879 | |
| S11 | Aspherical surface | 1.5623 | 0.3555 | 1.54/56.1 | -4.3138 |
| S12 | Aspherical surface | 2.0594 | 0.6626 | -3.5892 | |
| S13 | Aspherical surface | 3.2110 | 0.3444 | 1.54/56.1 | -22.0345 |
| S14 | Aspherical surface | 1.4268 | 0.1684 | -6.5697 | |
| S15 | Spherical surface | All-round | 0.1600 | 1.52/64.2 | |
| S16 | Spherical surface | All-round | 0.3564 | ||
| S17 | Spherical surface | All-round |
In this example, each lens may be an aspherical lens, and each aspherical surface type x is defined by the following formula:
wherein x is the distance rise from the aspheric surface vertex at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface,
(i.e., paraxial curvature c is the inverse of radius of curvature R in Table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface.
Table two shows the high-order term coefficients of the respective aspherical surfaces that can be used for the respective aspherical surface lenses in this example.
Table two: example one higher order coefficient of each aspherical surface
| Surface type | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 2.4088E-04 | -5.7702E-03 | 2.4087E-02 | -6.9199E-02 | 1.0383E-01 | -9.0423E-02 | 4.5043E-02 | -1.1823E-02 | 1.2407E-03 |
| S2 | 2.2333E-03 | 9.8560E-02 | -2.9845E-01 | 5.4759E-01 | -6.4231E-01 | 4.6749E-01 | -2.0031E-01 | 4.5788E-02 | -4.3040E-03 |
| S3 | -1.6509E-01 | 3.5124E-01 | -7.4131E-01 | 1.2925E+00 | -1.6781E+00 | 1.4371E+00 | -7.4011E-01 | 2.0506E-01 | -2.3320E-02 |
| S4 | -1.7429E-01 | 2.9158E-01 | -2.6012E-01 | -4.6904E-01 | 2.3238E+00 | -4.4312E+00 | 4.4756E+00 | -2.2924E+00 | 4.6512E-01 |
| S5 | 2.0521E-01 | -4.5551E-01 | 1.4369E+00 | -4.2178E+00 | 9.3280E+00 | -1.3796E+01 | 1.2425E+01 | -6.0413E+00 | 1.2061E+00 |
| S6 | -4.0580E-02 | 1.7015E-01 | -1.0755E+00 | 3.8064E+00 | -7.6782E+00 | 8.6620E+00 | -4.7959E+00 | 6.5834E-01 | 2.8482E-01 |
| S7 | -1.1925E-01 | -1.0007E-01 | 4.7387E-01 | -1.7040E+00 | 4.0762E+00 | -6.2521E+00 | 5.9148E+00 | -3.1478E+00 | 7.2324E-01 |
| S8 | -8.0047E-02 | -1.5927E-01 | 5.3649E-01 | -1.4334E+00 | 2.5303E+00 | -2.8704E+00 | 2.0193E+00 | -8.0411E-01 | 1.3851E-01 |
| S9 | 9.7840E-02 | -2.2952E-01 | 4.8596E-01 | -7.6929E-01 | 6.7289E-01 | -2.4089E-01 | -7.0643E-02 | 8.7811E-02 | -2.1539E-02 |
| S10 | -1.1799E-01 | 1.4009E-01 | -3.5760E-03 | -1.7571E-01 | 2.2583E-01 | -1.4464E-01 | 5.1609E-02 | -9.7069E-03 | 7.5106E-04 |
| S11 | -1.2438E-01 | 1.1165E-01 | -1.6964E-01 | 1.7588E-01 | -1.2756E-01 | 6.2300E-02 | -1.9079E-02 | 3.2637E-03 | -2.3551E-04 |
| S12 | 1.5866E-02 | -1.0384E-01 | 9.6553E-02 | -5.8164E-02 | 2.3570E-02 | -6.2237E-03 | 1.0141E-03 | -9.2363E-05 | 3.5953E-06 |
| S13 | -2.6175E-01 | 1.8181E-01 | -1.0150E-01 | 4.5860E-02 | -1.5661E-02 | 3.8579E-03 | -6.4664E-04 | 6.5393E-05 | -2.9664E-06 |
| S14 | -1.4742E-01 | 9.0443E-02 | -4.2611E-02 | 1.4157E-02 | -3.7552E-03 | 8.1772E-04 | -1.2987E-04 | 1.2341E-05 | -5.0517E-07 |
Table three shows the effective focal length F of the optical imaging lens in example one, the effective focal lengths F1 to F7 of the respective lenses, the distance TTL on the optical axis from the first lens object side surface S1 to the imaging surface S17, the F number Fno of the optical imaging lens, half ImgH of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and the maximum half field angle HFOV.
Table three: parameters of optical imaging lens
| Parameter \ example | 1 |
| TTL(mm) | 5.10 |
| ImgH(mm) | 3.07 |
| Semi-FOV(°) | 35.0 |
| Fno | 1.96 |
| f(mm) | 4.10 |
| f1(mm) | 4.71 |
| f2(mm) | -5.71 |
| f3(mm) | 4.64 |
| f4(mm) | -19.44 |
| f5(mm) | -46.42 |
| f6(mm) | 9.50 |
| f7(mm) | -5.06 |
Table IV shows the relationship of the optical imaging lens in example one, in which
The f/EPD is 1.96, the f/EPD is in the range of 1.4 to 1.98, and the larger aperture can be realized to increase the light inlet quantity on the premise of compressing the whole size of the lens and ensuring the normal yield of mass production, and the low-order aberration of the system can be effectively balanced and controlled.
T23/T34 is 0.29, T23/T34 is in the range of 0.1 to 0.3, the aperture can be enlarged, and the light entering amount can be increased.
R11/f3 is 0.34, R11/f3 is in the range of 0.1 to 0.5, the optical sensitivities of the third lens E3 and the sixth lens E6 are reduced, so that the aberration in the range is reduced, and the imaging quality is improved
f2/f7 is 1.13, and f2/f7 is in the range of 1 to 1.6, so that the spherical aberration is controlled in a reasonable range to have better imaging effect.
(R12-R11)/(R12+ R11) ═ 0.14, (R12-R11)/(R12+ R11) is in the range of 0 to 0.5, avoiding the occurrence of an excessively large incident angle of the optical imaging lens, while the range of optical power of the optical imaging lens can be constrained to reduce coma.
Sigma CT/TD is 0.53, and sigma CT/TD is in the range of 0.3 to 0.8, so that the thickness of each lens is in a reasonable range relative to the length of the optical imaging lens, the size of the optical imaging lens is reduced, and the difficulty of manufacturing the lens is reduced.
R11/R14 is 1.09, and R11/R14 is in the range of 0.9 to 1.5, which can reduce the optical sensitivity of the sixth lens E6 and the seventh lens E7.
SAG11/ET1 is 3.44, SAG11/ET1 is in the range of 3 to 3.6, the mass producibility of the first lens E1 is increased, and the first lens E1 is easy to assemble on the lens barrel.
The CT6/(T67+ CT7) is 0.35, and the CT6/(T67+ CT7) is in the range of 0.1 to 0.6, so that the sixth lens E6 and the seventh lens E7 are ensured not to be too thin to influence production, and the total length of the optical imaging lens is prevented from exceeding the manufacturing limit.
(f/f1) + (f/f3) ═ 1.75, (f/f1) + (f/f3) in the range of 1.3 to 2, is advantageous for reducing the spherical aberration and curvature of field of the first lens E1 and the third lens E3.
The EPD/SIGMA AT is 1.05, the total length of the air space is reasonably restricted within the range of 0.9 to 1.6, so that the lens structure is more compact, and the effective focal length and the total length of the optical imaging lens are still within a reasonable range while the large aperture is realized.
|SAG71*T67|/ImgH2＝0.05，|SAG71*T67|/ImgH2In the range of 0.04 to 0.09, the ratio of the sagittal height of the seventh lens object-side surface S14 to the air space between the sixth lens E6 and the seventh lens E7 with respect to the image height is defined, so that the seventh lens E7 can be more easily processed, and the total length of the optical imaging lens can be reduced accordingly.
Table four: example one relationship of an optical imaging lens
| Conditional \ example | 1 |
| f/EPD | 1.96 |
| T23/T34 | 0.29 |
| R11/f3 | 0.34 |
| f2/f7 | 1.13 |
| (R12-R11)/(R12+R11) | 0.14 |
| ∑CT/TD | 0.53 |
| R11/R14 | 1.09 |
| SAG11/ET1 | 3.44 |
| CT6/(T67+CT7) | 0.35 |
| (f/f1)+(f/f3) | 1.75 |
| EPD/∑AT | 1.05 |
| |SAG71*T67|/ImgH^2 | 0.05 |
In this example, the optical imaging lens has an optical axis length of 5.1mm from the first lens object-side surface S1 to the imaging surface S17, an effective focal length of 4.1mm, an image height of 3.07mm, a maximum half angle of view of 35 degrees, and an aperture value of 1.96. This example has guaranteed great light ring when guaranteeing the miniaturization of optical imaging lens, can acquire more light inlet volume, reduces optical aberration when light is not enough, promotes the image acquisition quality, acquires stable formation of image effect. Note that the larger the aperture value, the smaller the aperture, and the smaller the aperture value, the larger the aperture.
Fig. 2 shows an axial chromatic aberration curve on the optical imaging lens of example one, which shows that the converging focal points of the light rays with different wavelengths after passing through the optical system deviate, so that the image focal planes of the light rays with different wavelengths cannot coincide at the time of final imaging, and the polychromatic light spreads to form chromatic dispersion. Fig. 3 shows astigmatism curves of the optical imaging lens of example one, which represent meridional field curvature and sagittal field curvature. Fig. 4 shows distortion curves of the optical imaging lens of example one, which represent distortion magnitude values in the case of different angles of view. Fig. 5 shows a chromatic aberration of magnification curve of the optical imaging lens of the first example, which represents a phase difference of different image heights on the imaging plane after light passes through the optical imaging lens. As can be seen from fig. 2 to 5, the optical imaging lens according to example one is suitable for portable electronic products, has a large aperture and good imaging quality.
Example two
As shown in fig. 6, the optical imaging lens includes, in order from an object side to an image side along an optical axis: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a diaphragm STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.
The first lens E1 has positive focal power, the first lens object-side surface S1 is convex, and the first lens image-side surface S2 is concave; the second lens E2 has negative power, the second lens object-side surface S3 is convex, and the second lens image-side surface S4 is concave; the third lens E3 has positive focal power, the third lens object-side surface S5 is convex, and the third lens image-side surface S6 is convex; the fourth lens element E4 has negative power, the fourth lens element object-side surface S7 is concave, and the fourth lens element image-side surface S8 is concave; the fifth lens element E5 has negative power, the fifth lens element object-side surface S9 is concave, and the fifth lens element image-side surface S10 is convex; the sixth lens element E6 has positive refractive power, the sixth lens element object-side surface S11 is convex, and the sixth lens element image-side surface S12 is concave; the seventh lens element E7 has negative power, the seventh lens object-side surface S13 is convex, and the seventh lens image-side surface S14 is concave. Filter E8 has a filter object side S15 and a filter image side S16. The light from the object passes through the surfaces in sequence and is finally imaged on the imaging plane S17.
Table five shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example two, where the unit of radius of curvature and thickness are both millimeters.
Table five: detailed optical data for each lens in example two
In this example, each lens may be an aspherical lens, and each aspherical surface type x is defined by the following formula:
wherein x is the distance rise from the aspheric surface vertex at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface,
(i.e., paraxial curvature c is the inverse of radius of curvature R in Table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface.
Table six shows the high-order term coefficients of the respective aspherical surfaces that can be used for the respective aspherical surface lenses in this example.
Table six: example two higher order coefficient of each aspherical surface
| Surface type | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | -1.8479E-03 | 3.1740E-03 | -1.1128E-02 | 1.9560E-02 | -2.6892E-02 | 2.3399E-02 | -1.2367E-02 | 3.6092E-03 | -4.5696E-04 |
| S2 | 1.2918E-02 | 7.9455E-02 | -2.3951E-01 | 3.6217E-01 | -3.3066E-01 | 1.8675E-01 | -6.3398E-02 | 1.1925E-02 | -9.9792E-04 |
| S3 | -1.4263E-01 | 3.4543E-01 | -8.5841E-01 | 1.4566E+00 | -1.6004E+00 | 1.1159E+00 | -4.7517E-01 | 1.1254E-01 | -1.1344E-02 |
| S4 | -1.7846E-01 | 3.7581E-01 | -8.1901E-01 | 1.0615E+00 | -3.1170E-01 | -9.5043E-01 | 1.2704E+00 | -6.3793E-01 | 1.1868E-01 |
| S5 | 1.8946E-01 | -3.6927E-01 | 9.9076E-01 | -2.5272E+00 | 4.8087E+00 | -5.8611E+00 | 4.2621E+00 | -1.6822E+00 | 2.7836E-01 |
| S6 | -2.6697E-02 | 9.0938E-02 | -3.8504E-01 | 8.5106E-01 | -8.2365E-01 | -4.7925E-02 | 8.2778E-01 | -6.7223E-01 | 1.7842E-01 |
| S7 | -1.0513E-01 | -1.1555E-01 | 5.2137E-01 | -1.5834E+00 | 3.1584E+00 | -4.0235E+00 | 3.1546E+00 | -1.3896E+00 | 2.6260E-01 |
| S8 | -7.1299E-02 | -1.7487E-01 | 5.0892E-01 | -1.1793E+00 | 1.8134E+00 | -1.7611E+00 | 1.0506E+00 | -3.5423E-01 | 5.1642E-02 |
| S9 | 1.1511E-01 | -2.5510E-01 | 4.8010E-01 | -7.5681E-01 | 6.8054E-01 | -2.8340E-01 | -7.1337E-03 | 4.7586E-02 | -1.2119E-02 |
| S10 | -1.1276E-01 | 1.7738E-01 | -8.9764E-02 | -8.3760E-02 | 1.4621E-01 | -9.0542E-02 | 2.8555E-02 | -4.5030E-03 | 2.7769E-04 |
| S11 | -1.0892E-01 | 8.9157E-02 | -1.2382E-01 | 1.1891E-01 | -7.9420E-02 | 3.5422E-02 | -9.8728E-03 | 1.5357E-03 | -1.0068E-04 |
| S12 | 1.6034E-02 | -1.2696E-01 | 1.3938E-01 | -9.7790E-02 | 4.5857E-02 | -1.4187E-02 | 2.7709E-03 | -3.0970E-04 | 1.5077E-05 |
| S13 | -2.9769E-01 | 2.0734E-01 | -1.1449E-01 | 4.8537E-02 | -1.5433E-02 | 3.7806E-03 | -6.9603E-04 | 8.2636E-05 | -4.4758E-06 |
| S14 | -1.6853E-01 | 1.1582E-01 | -6.5932E-02 | 2.9046E-02 | -1.0186E-02 | 2.6172E-03 | -4.3938E-04 | 4.2031E-05 | -1.7190E-06 |
Table seven shows the effective focal length F of the optical imaging lens in example two, the effective focal lengths F1 to F7 of the respective lenses, the distance TTL on the optical axis from the first lens object-side surface S1 to the imaging surface S17, the F-number Fno of the optical imaging lens, half ImgH of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and the maximum half field angle HFOV.
TABLE VII: parameters of optical imaging lens
| Parameter \ example | 2 |
| TTL(mm) | 5.10 |
| ImgH(mm) | 3.08 |
| Semi-FOV(°) | 35.0 |
| Fno | 1.69 |
| f(mm) | 4.10 |
| f1(mm) | 4.85 |
| f2(mm) | -5.46 |
| f3(mm) | 4.46 |
| f4(mm) | -20.48 |
| f5(mm) | -43.58 |
| f6(mm) | 8.60 |
| f7(mm) | -4.72 |
Table eight shows the relationship of the optical imaging lens in example two, in which
The f/EPD is 1.66, the f/EPD is in the range of 1.4 to 1.98, and the larger aperture can be realized to increase the light inlet quantity on the premise of compressing the whole size of the lens and ensuring the normal yield of mass production, and the low-order aberration of the control system can be effectively balanced.
T23/T34 is 0.14, T23/T34 is in the range of 0.1 to 0.3, the aperture can be enlarged, and the light entering amount can be increased.
R11/f3 is 0.34, R11/f3 is in the range of 0.1 to 0.5, the optical sensitivities of the third lens E3 and the sixth lens E6 are reduced, so that the aberration in the range is reduced, and the imaging quality is improved
f2/f7 is 1.16, and f2/f7 is in the range of 1 to 1.6, so that the spherical aberration is controlled in a reasonable range to have better imaging effect.
(R12-R11)/(R12+ R11) ═ 0.15, (R12-R11)/(R12+ R11) is in the range of 0 to 0.5, avoiding the occurrence of an excessively large incident angle of the optical imaging lens, while the range of optical power of the optical imaging lens can be constrained to reduce coma.
Sigma CT/TD is 0.54, and sigma CT/TD is in the range of 0.3 to 0.8, so that the thickness of each lens is in a reasonable range relative to the length of the optical imaging lens, the size of the optical imaging lens is reduced, and the difficulty of manufacturing the lens is reduced.
R11/R14 is 1.21, and R11/R14 is in the range of 0.9 to 1.5, the optical sensitivity of the sixth lens E6 and the seventh lens E7 can be reduced.
SAG11/ET1 is 3.51, SAG11/ET1 is in the range of 3 to 3.6, the mass producibility of the first lens E1 is increased, and the first lens E1 is easy to assemble on the lens barrel.
The CT6/(T67+ CT7) is 0.35, and the CT6/(T67+ CT7) is in the range of 0.1 to 0.6, so that the sixth lens E6 and the seventh lens E7 are ensured not to be too thin to influence production, and the total length of the optical imaging lens is prevented from exceeding the manufacturing limit.
(f/f1) + (f/f3) ═ 1.76, (f/f1) + (f/f3) in the range of 1.3 to 2, is advantageous for reducing the spherical aberration and curvature of field of the first lens E1 and the third lens E3.
The EPD/SIGMA AT is 1.26, the total length of the air space is reasonably restricted, so that the lens structure is more compact, and the effective focal length and the total length of the optical imaging lens are still in a reasonable range while the large aperture is realized.
|SAG71*T67|/ImgH2＝0.07，|SAG71*T67|/ImgH2In the range of 0.04 to 0.09, the ratio of the sagittal height of the seventh lens object-side surface S14 to the air space between the sixth lens E6 and the seventh lens E7 with respect to the image height is defined, so that the seventh lens E7 can be more easily processed, and the total length of the optical imaging lens can be reduced accordingly.
Table eight: example two relationships of optical imaging lens
| Conditional \ example | 2 |
| f/EPD | 1.66 |
| T23/T34 | 0.14 |
| R11/f3 | 0.34 |
| f2/f7 | 1.16 |
| (R12-R11)/(R12+R11) | 0.15 |
| ∑CT/TD | 0.54 |
| R11/R14 | 1.21 |
| SAG11/ET1 | 3.51 |
| CT6/(T67+CT7) | 0.35 |
| (f/f1)+(f/f3) | 1.76 |
| EPD/∑AT | 1.26 |
| |SAG71*T67|/ImgH^2 | 0.07 |
In this example, the optical imaging lens has an optical axis length of 5.1mm from the first lens object-side surface S1 to the imaging surface S17, an effective focal length of 4.1mm, an image height of 3.08mm, a maximum half angle of view of 35 degrees, and an aperture value of 1.69. This example has guaranteed great light ring when guaranteeing the miniaturization of optical imaging lens, can acquire more light inlet volume, reduces optical aberration when light is not enough, promotes the image acquisition quality, acquires stable formation of image effect. Note that the larger the aperture value, the smaller the aperture, and the smaller the aperture value, the larger the aperture.
Fig. 7 shows an on-axis chromatic aberration curve on the optical imaging lens of example two, which indicates that the converging focal points of the light rays with different wavelengths after passing through the optical system are deviated, so that the image focal planes of the light rays with different wavelengths cannot be overlapped at the time of final imaging, and the polychromatic light is dispersed to form chromatic dispersion. Fig. 8 shows astigmatism curves of the optical imaging lens of example two, which represent meridional field curvature and sagittal field curvature. Fig. 9 shows distortion curves of the optical imaging lens of example two, which represent distortion magnitude values in the case of different angles of view. Fig. 10 shows a chromatic aberration of magnification curve of the optical imaging lens of the second example, which represents a phase difference of different image heights on the imaging surface after light passes through the optical imaging lens. As can be seen from fig. 7 to 10, the optical imaging lens according to example two is suitable for portable electronic products, has a large aperture and good imaging quality.
Example III
As shown in fig. 11, the optical imaging lens includes, in order from an object side to an image side along an optical axis: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a diaphragm STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.
The first lens E1 has positive focal power, the first lens object-side surface S1 is convex, and the first lens image-side surface S2 is concave; the second lens E2 has negative power, the second lens object-side surface S3 is convex, and the second lens image-side surface S4 is concave; the third lens E3 has positive focal power, the third lens object-side surface S5 is convex, and the third lens image-side surface S6 is convex; the fourth lens element E4 has negative power, the fourth lens element object-side surface S7 is concave, and the fourth lens element image-side surface S8 is concave; the fifth lens element E5 has negative power, the fifth lens element object-side surface S9 is concave, and the fifth lens element image-side surface S10 is convex; the sixth lens element E6 has positive refractive power, the sixth lens element object-side surface S11 is convex, and the sixth lens element image-side surface S12 is concave; the seventh lens element E7 has negative power, the seventh lens object-side surface S13 is convex, and the seventh lens image-side surface S14 is concave. Filter E8 has a filter object side S15 and a filter image side S16. The light from the object passes through the surfaces in sequence and is finally imaged on the imaging plane S17.
Table nine shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example three, where the unit of the radius of curvature and the thickness are both in millimeters.
Table nine: detailed optical data for each lens in example three
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | All-round | All-round | ||
| S1 | Aspherical surface | 2.0025 | 0.5889 | 1.54/56.2 | 0.0516 |
| S2 | Aspherical surface | 6.4525 | 0.1000 | 6.8702 | |
| S3 | Aspherical surface | 3.2591 | 0.1900 | 1.64/23.5 | -0.3460 |
| S4 | Aspherical surface | 1.6526 | 0.1000 | -0.8543 | |
| S5 | Aspherical surface | 2.4926 | 0.5283 | 1.54/56.1 | -25.8024 |
| S6 | Aspherical surface | -34.0977 | 0.1000 | -16.3104 | |
| STO | Spherical surface | All-round | 0.5926 | ||
| S7 | Aspherical surface | -47.3087 | 0.2529 | 1.66/20.4 | 24.4886 |
| S8 | Aspherical surface | 25.6027 | 0.2513 | 49.8762 | |
| S9 | Aspherical surface | -10.7204 | 0.3003 | 1.64/23.5 | 9.2821 |
| S10 | Aspherical surface | -17.4530 | 0.1036 | 50.0000 | |
| S11 | Aspherical surface | 1.5574 | 0.2996 | 1.54/56.1 | -5.4147 |
| S12 | Aspherical surface | 2.1972 | 0.7663 | -3.9163 | |
| S13 | Aspherical surface | 3.1450 | 0.2500 | 1.54/56.1 | -51.6404 |
| S14 | Aspherical surface | 1.2936 | 0.1540 | -8.6196 | |
| S15 | Spherical surface | All-round | 0.1900 | 1.52/64.2 | |
| S16 | Spherical surface | All-round | 0.3323 | ||
| S17 | Spherical surface | All-round |
In this example, each lens may be an aspherical lens, and each aspherical surface type x is defined by the following formula:
wherein x is the distance rise from the aspheric surface vertex at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface,
(i.e. theParaxial curvature c is the inverse of radius of curvature R in table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface.
Table ten shows the high-order term coefficients of the respective aspherical surfaces that can be used for the respective aspherical surface lenses in this example.
TABLE Ten: example three higher order coefficient of each aspherical surface
| Surface type | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | -2.0209E-03 | -3.5752E-03 | 2.3824E-02 | -5.9237E-02 | 7.4204E-02 | -5.4782E-02 | 2.3759E-02 | -5.5696E-03 | 5.3229E-04 |
| S2 | 9.6899E-03 | 1.0064E-01 | -2.7952E-01 | 3.9940E-01 | -3.4267E-01 | 1.7794E-01 | -5.2775E-02 | 7.6814E-03 | -3.6338E-04 |
| S3 | -1.3441E-01 | 3.2438E-01 | -7.8321E-01 | 1.2600E+00 | -1.2945E+00 | 8.3789E-01 | -3.2983E-01 | 7.2060E-02 | -6.6946E-03 |
| S4 | -1.7779E-01 | 3.7704E-01 | -8.9569E-01 | 1.3950E+00 | -1.0699E+00 | 9.7591E-02 | 4.1543E-01 | -2.6421E-01 | 5.1517E-02 |
| S5 | 1.8295E-01 | -3.4397E-01 | 9.0026E-01 | -2.2260E+00 | 4.1091E+00 | -4.8388E+00 | 3.3836E+00 | -1.2801E+00 | 2.0232E-01 |
| S6 | -2.2333E-02 | 9.1318E-02 | -3.5904E-01 | 7.3301E-01 | -6.3421E-01 | -1.3020E-01 | 7.1084E-01 | -5.2552E-01 | 1.3037E-01 |
| S7 | -8.7956E-02 | -1.7348E-01 | 7.2373E-01 | -2.0809E+00 | 3.9833E+00 | -4.8971E+00 | 3.7105E+00 | -1.5804E+00 | 2.8921E-01 |
| S8 | -6.1119E-02 | -1.9856E-01 | 5.9168E-01 | -1.3767E+00 | 2.1719E+00 | -2.1784E+00 | 1.3387E+00 | -4.6233E-01 | 6.8756E-02 |
| S9 | 1.0779E-01 | -2.4843E-01 | 5.0120E-01 | -8.5006E-01 | 8.4830E-01 | -4.4944E-01 | 8.7999E-02 | 1.7635E-02 | -8.0026E-03 |
| S10 | -1.1551E-01 | 1.9869E-01 | -1.4119E-01 | -3.4628E-02 | 1.1638E-01 | -7.5674E-02 | 2.2432E-02 | -2.9162E-03 | 1.0378E-04 |
| S11 | -1.1008E-01 | 8.5867E-02 | -1.1189E-01 | 1.0389E-01 | -6.8369E-02 | 3.0229E-02 | -8.3546E-03 | 1.2862E-03 | -8.3168E-05 |
| S12 | 1.1306E-02 | -1.4442E-01 | 1.8120E-01 | -1.4473E-01 | 7.6607E-02 | -2.6587E-02 | 5.7907E-03 | -7.1740E-04 | 3.8515E-05 |
| S13 | -3.1848E-01 | 2.0618E-01 | -9.5804E-02 | 2.9470E-02 | -5.5190E-03 | 7.0413E-04 | -1.2104E-04 | 2.4738E-05 | -2.2108E-06 |
| S14 | -1.6727E-01 | 1.1123E-01 | -6.1034E-02 | 2.6206E-02 | -8.9867E-03 | 2.2471E-03 | -3.6817E-04 | 3.4839E-05 | -1.4346E-06 |
Table eleven shows the effective focal length F of the optical imaging lens in example three, the effective focal lengths F1 to F7 of the respective lenses, the distance TTL on the optical axis from the first lens object-side surface S1 to the imaging surface S17, the F-number Fno of the optical imaging lens, half ImgH of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and the maximum half field angle HFOV.
Table eleven: parameters of optical imaging lens
| Parameter \ example | 3 |
| TTL(mm) | 5.10 |
| ImgH(mm) | 3.02 |
| Semi-FOV(°) | 35.0 |
| Fno | 1.65 |
| f(mm) | 4.10 |
| f1(mm) | 5.09 |
| f2(mm) | -5.49 |
| f3(mm) | 4.29 |
| f4(mm) | -25.11 |
| f5(mm) | -44.21 |
| f6(mm) | 8.44 |
| f7(mm) | -4.24 |
Table twelve shows the relationship of the optical imaging lens in example three, in which
The f/EPD is 1.65, the f/EPD is in the range of 1.4 to 1.98, and the larger aperture can be realized to increase the light inlet quantity on the premise of compressing the whole size of the lens and ensuring the normal yield of mass production, and the low-order aberration of the control system can be effectively balanced.
T23/T34 is 0.14, T23/T34 is in the range of 0.1 to 0.3, the aperture can be enlarged, and the light entering amount can be increased.
R11/f3 is 0.36, R11/f3 is in the range of 0.1 to 0.5, the optical sensitivities of the third lens E3 and the sixth lens E6 are reduced, so that the aberration in the range is reduced, and the imaging quality is improved
f2/f7 is 1.30, and f2/f7 is in the range of 1 to 1.6, so that the spherical aberration is controlled in a reasonable range to have better imaging effect.
(R12-R11)/(R12+ R11) ═ 0.17, (R12-R11)/(R12+ R11) is in the range of 0 to 0.5, avoiding the occurrence of an excessively large incident angle of the optical imaging lens, while the range of optical power of the optical imaging lens can be constrained to reduce coma.
Sigma CT/TD is 0.53, and sigma CT/TD is in the range of 0.3 to 0.8, so that the thickness of each lens is in a reasonable range relative to the length of the optical imaging lens, the size of the optical imaging lens is reduced, and the difficulty of manufacturing the lens is reduced.
R11/R14 is 1.20, and R11/R14 is in the range of 0.9 to 1.5, the optical sensitivity of the sixth lens E6 and the seventh lens E7 can be reduced.
SAG11/ET1 is 3.29, SAG11/ET1 is in the range of 3 to 3.6, the mass producibility of the first lens E1 is increased, and the first lens E1 is easily assembled to the lens barrel.
The CT6/(T67+ CT7) is 0.29, and the CT6/(T67+ CT7) is in the range of 0.1 to 0.6, so that the sixth lens E6 and the seventh lens E7 are ensured not to be too thin to influence production, and the total length of the optical imaging lens is prevented from exceeding the manufacturing limit.
(f/f1) + (f/f3) ═ 1.76, (f/f1) + (f/f3) in the range of 1.3 to 2, is advantageous for reducing the spherical aberration and curvature of field of the first lens E1 and the third lens E3.
The EPD/SIGMA AT is 1.23, the total length of the air space is reasonably restricted, so that the lens structure is more compact, and the effective focal length and the total length of the optical imaging lens are still in a reasonable range while the large aperture is realized.
|SAG71*T67|/ImgH2＝0.08，|SAG71*T67|/ImgH2In the range of 0.04 to 0.09, the ratio of the sagittal height of the seventh lens object-side surface S14 to the air space between the sixth lens E6 and the seventh lens E7 with respect to the image height is defined, so that the seventh lens E7 can be more easily processed, and the total length of the optical imaging lens can be reduced accordingly.
Table twelve: third example relationships of optical imaging lens
| Conditional \ example | 3 |
| f/EPD | 1.65 |
| T23/T34 | 0.14 |
| R11/f3 | 0.36 |
| f2/f7 | 1.30 |
| (R12-R11)/(R12+R11) | 0.17 |
| ∑CT/TD | 0.53 |
| R11/R14 | 1.20 |
| SAG11/ET1 | 3.29 |
| CT6/(T67+CT7) | 0.29 |
| (f/f1)+(f/f3) | 1.76 |
| EPD/∑AT | 1.23 |
| |SAG71*T67|/ImgH^2 | 0.08 |
In this example, the optical imaging lens has an optical axis length of 5.1mm from the first lens object-side surface S1 to the imaging surface S17, an effective focal length of 4.1mm, an image height of 3.02mm, a maximum half angle of view of 35 degrees, and an aperture value of 1.65. This example has guaranteed great light ring when guaranteeing the miniaturization of optical imaging lens, can acquire more light inlet volume, reduces optical aberration when light is not enough, promotes the image acquisition quality, acquires stable formation of image effect. Note that the larger the aperture value, the smaller the aperture, and the smaller the aperture value, the larger the aperture.
Fig. 12 shows an on-axis chromatic aberration curve on the optical imaging lens of example three, which indicates that the converging focal points of the light rays with different wavelengths after passing through the optical system are deviated, so that the image focal planes of the light rays with different wavelengths cannot coincide at the time of final imaging, and the polychromatic light is dispersed to form chromatic dispersion. Fig. 13 shows astigmatism curves of the optical imaging lens of example three, which represent meridional field curvature and sagittal field curvature. Fig. 14 shows distortion curves of the optical imaging lens of example three, which represent distortion magnitude values in the case of different angles of view. Fig. 15 shows a chromatic aberration of magnification curve of the optical imaging lens of example three, which represents a phase difference of different image heights on the imaging plane after light passes through the optical imaging lens. As can be seen from fig. 12 to 15, the optical imaging lens according to example three is suitable for portable electronic products, has a large aperture and good imaging quality.
Example four
As shown in fig. 16, the optical imaging lens includes, in order from an object side to an image side along an optical axis: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a diaphragm STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.
The first lens E1 has positive focal power, the first lens object-side surface S1 is convex, and the first lens image-side surface S2 is convex; the second lens E2 has negative power, the second lens object-side surface S3 is convex, and the second lens image-side surface S4 is concave; the third lens E3 has positive focal power, the third lens object-side surface S5 is convex, and the third lens image-side surface S6 is concave; the fourth lens element E4 has negative power, the fourth lens element object-side surface S7 is convex, and the fourth lens element image-side surface S8 is concave; the fifth lens element E5 has positive power, the fifth lens element object-side surface S9 is concave, and the fifth lens element image-side surface S10 is convex; the sixth lens element E6 has positive refractive power, the sixth lens element object-side surface S11 is convex, and the sixth lens element image-side surface S12 is concave; the seventh lens element E7 has negative power, the seventh lens object-side surface S13 is convex, and the seventh lens image-side surface S14 is concave. Filter E8 has a filter object side S15 and a filter image side S16. The light from the object passes through the surfaces in sequence and is finally imaged on the imaging plane S17.
Table thirteen shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example four, in which the units of the radius of curvature and the thickness are both millimeters.
Table thirteen: detailed optical data for each lens in example four
In this example, each lens may be an aspherical lens, and each aspherical surface type x is defined by the following formula:
wherein x is the position time distance between the aspheric surface and the position with the height h along the optical axis directionThe rise of the distance of the spherical vertex; c is the paraxial curvature of the aspheric surface,
(i.e., paraxial curvature c is the inverse of radius of curvature R in Table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface.
Table fourteen shows the high-order term coefficients of each aspherical surface usable for each aspherical surface lens in this example.
Table fourteen: example four higher order coefficient of each aspherical surface
| Surface type | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | -5.8071E-03 | 1.7191E-03 | -5.9740E-03 | 4.9410E-03 | -2.3506E-03 | 5.4927E-04 | -4.8040E-05 | 0.0000E+00 | 0.0000E+00 |
| S2 | 3.3065E-02 | -3.4215E-02 | 3.2700E-02 | -2.2061E-02 | 8.9485E-03 | -2.1975E-03 | 3.4616E-04 | -3.5330E-05 | 1.8813E-06 |
| S3 | -5.4229E-02 | -2.3659E-02 | 8.0182E-02 | -7.6031E-02 | 3.5820E-02 | -8.4954E-03 | 8.2130E-04 | 0.0000E+00 | 0.0000E+00 |
| S4 | -6.6282E-02 | -6.0526E-02 | 1.3623E-01 | -1.0619E-01 | 3.9686E-02 | -7.0339E-03 | 5.5652E-04 | 0.0000E+00 | 0.0000E+00 |
| S5 | 1.4211E-01 | -1.9935E-01 | 3.7357E-01 | -5.9527E-01 | 7.2036E-01 | -5.7861E-01 | 2.8273E-01 | -7.5507E-02 | 8.3789E-03 |
| S6 | -2.8622E-02 | 7.6196E-02 | -2.9812E-01 | 7.0701E-01 | -1.0232E+00 | 9.2282E-01 | -5.0339E-01 | 1.5016E-01 | -1.8561E-02 |
| S7 | -1.2242E-01 | -3.1434E-01 | 1.2609E+00 | -2.7175E+00 | 3.9966E+00 | -3.8912E+00 | 2.3573E+00 | -7.9582E-01 | 1.1261E-01 |
| S8 | -4.2664E-02 | -4.2109E-01 | 1.0829E+00 | -1.8565E+00 | 2.3321E+00 | -2.0453E+00 | 1.1466E+00 | -3.6405E-01 | 4.8858E-02 |
| S9 | 1.5280E-01 | -3.6636E-01 | 6.8995E-01 | -1.1693E+00 | 1.2641E+00 | -7.0638E-01 | 4.1715E-02 | 1.3567E-01 | -4.2258E-02 |
| S10 | -7.3402E-02 | 1.1509E-01 | -3.1579E-01 | 7.4649E-01 | -1.2742E+00 | 1.3866E+00 | -9.2431E-01 | 3.4313E-01 | -5.3392E-02 |
| S11 | -8.0303E-02 | 9.7744E-02 | -1.5814E-01 | 1.6066E-01 | -1.1165E-01 | 5.0526E-02 | -1.3742E-02 | 2.0206E-03 | -1.2337E-04 |
| S12 | -3.1450E-03 | -2.5407E-02 | 1.9977E-02 | -3.6696E-02 | 3.7041E-02 | -2.0994E-02 | 6.7207E-03 | -1.1245E-03 | 7.6090E-05 |
| S13 | -4.2786E-01 | 4.9261E-01 | -5.9778E-01 | 5.5574E-01 | -3.4567E-01 | 1.3617E-01 | -3.2253E-02 | 4.1743E-03 | -2.2666E-04 |
| S14 | -1.9050E-01 | 2.1555E-01 | -1.9837E-01 | 1.2203E-01 | -4.8948E-02 | 1.2350E-02 | -1.8551E-03 | 1.5015E-04 | -5.0185E-06 |
Table fifteen gives the effective focal length F of the optical imaging lens in example four, the effective focal lengths F1 to F7 of the respective lenses, the distance TTL on the optical axis from the first lens object-side surface S1 to the imaging surface S17, the F-number Fno of the optical imaging lens, half ImgH of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and the maximum half field angle HFOV.
Table fifteen: parameters of optical imaging lens
| Parameter \ example | 4 |
| TTL(mm) | 5.40 |
| ImgH(mm) | 2.45 |
| Semi-FOV(°) | 31.0 |
| Fno | 1.49 |
| f(mm) | 4.00 |
| f1(mm) | 4.79 |
| f2(mm) | -6.05 |
| f3(mm) | 5.70 |
| f4(mm) | -12.30 |
| f5(mm) | 41.24 |
| f6(mm) | 6.39 |
| f7(mm) | -3.83 |
Table sixteenth shows the relationship of the optical imaging lens in example four, in which
The f/EPD is 1.49, the f/EPD is in the range of 1.4 to 1.98, and the larger aperture can be realized to increase the light inlet quantity on the premise of compressing the whole size of the lens and ensuring the normal yield of mass production, and the low-order aberration of the control system can be effectively balanced.
T23/T34 is 0.20, T23/T34 is in the range of 0.1 to 0.3, the aperture can be enlarged, and the light entering amount can be increased.
R11/f3 is 0.36, R11/f3 is in the range of 0.1 to 0.5, the optical sensitivities of the third lens E3 and the sixth lens E6 are reduced, so that the aberration in the range is reduced, and the imaging quality is improved
f2/f7 is 1.58, f2/f7 is in the range of 1 to 1.6, and the spherical aberration is controlled in a reasonable range to have better imaging effect.
(R12-R11)/(R12+ R11) ═ 0.37, (R12-R11)/(R12+ R11) is in the range of 0 to 0.5, avoiding the occurrence of an excessively large incident angle of the optical imaging lens, while the range of optical power of the optical imaging lens can be constrained to reduce coma.
Sigma CT/TD is 0.61, and sigma CT/TD is in the range of 0.3 to 0.8, so that the thickness of each lens is in a reasonable range relative to the length of the optical imaging lens, the size of the optical imaging lens is reduced, and the difficulty of manufacturing the lens is reduced.
R11/R14 is 1.40, and R11/R14 is in the range of 0.9 to 1.5, the optical sensitivity of the sixth lens E6 and the seventh lens E7 can be reduced.
SAG11/ET1 is 2.48, SAG11/ET1 is in the range of 3 to 3.6, the mass producibility of the first lens E1 is increased, and the first lens E1 is easy to assemble on the lens barrel.
The CT6/(T67+ CT7) is 0.55, and the CT6/(T67+ CT7) is in the range of 0.1 to 0.6, so that the sixth lens E6 and the seventh lens E7 are ensured not to be too thin to influence production, and the total length of the optical imaging lens is prevented from exceeding the manufacturing limit.
(f/f1) + (f/f3) ═ 1.54, (f/f1) + (f/f3) in the range of 1.3 to 2, is advantageous for reducing the spherical aberration and curvature of field of the first lens E1 and the third lens E3.
The total length of the air space is reasonably restricted, so that the lens structure is more compact, and the effective focal length and the total length of the optical imaging lens are still kept in a reasonable range while the large aperture is realized.
|SAG71*T67|/ImgH2＝0.08，|SAG71*T67|/ImgH2In the range of 0.04 to 0.09, limitThe ratio of the rise of the seventh lens object-side surface S14 to the height of the air space between the sixth lens E6 and the seventh lens E7 with respect to the image height makes the seventh lens E7 easier to process and the overall length of the optical imaging lens can be reduced accordingly.
Table sixteen: example four relationships for optical imaging lens
| Conditional \ example | 4 |
| f/EPD | 1.49 |
| T23/T34 | 0.20 |
| R11/f3 | 0.36 |
| f2/f7 | 1.58 |
| (R12-R11)/(R12+R11) | 0.37 |
| ∑CT/TD | 0.61 |
| R11/R14 | 1.40 |
| SAG11/ET1 | 2.48 |
| CT6/(T67+CT7) | 0.55 |
| (f/f1)+(f/f3) | 1.54 |
| EPD/∑AT | 1.57 |
| |SAG71*T67|/ImgH^2 | 0.08 |
In this example, the optical imaging lens has an optical axis length of 5.4mm from the first lens object-side surface S1 to the image-forming surface S17, an effective focal length of 4.0mm, an image height of 2.45mm, a maximum half field angle of 31 degrees, and an aperture value of 1.49. This example has guaranteed great light ring when guaranteeing the miniaturization of optical imaging lens, can acquire more light inlet volume, reduces optical aberration when light is not enough, promotes the image acquisition quality, acquires stable formation of image effect. Note that the larger the aperture value, the smaller the aperture, and the smaller the aperture value, the larger the aperture.
Fig. 17 shows an on-axis chromatic aberration curve on the optical imaging lens of example four, which indicates that the converging focal points of the light rays of different wavelengths after passing through the optical system are deviated, so that the image focal planes of the light rays of different wavelengths at the time of final imaging cannot coincide, and the polychromatic light spreads to form chromatic dispersion. Fig. 18 shows astigmatism curves of the optical imaging lens of example four, which represent meridional field curvature and sagittal field curvature. Fig. 19 shows distortion curves of the optical imaging lens of example four, which represent distortion magnitude values in the case of different angles of view. Fig. 20 shows a chromatic aberration of magnification curve of the optical imaging lens of example four, which represents a phase difference of different image heights on the imaging plane after light passes through the optical imaging lens. As can be seen from fig. 17 to 20, the optical imaging lens according to example four is suitable for portable electronic products, has a large aperture and good imaging quality.
Example five
As shown in fig. 21, the optical imaging lens includes, in order from an object side to an image side along an optical axis: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a diaphragm STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.
The first lens E1 has positive focal power, the first lens object-side surface S1 is convex, and the first lens image-side surface S2 is concave; the second lens E2 has negative power, the second lens object-side surface S3 is convex, and the second lens image-side surface S4 is concave; the third lens E3 has positive focal power, the third lens object-side surface S5 is convex, and the third lens image-side surface S6 is convex; the fourth lens element E4 has negative power, the fourth lens element object-side surface S7 is convex, and the fourth lens element image-side surface S8 is concave; the fifth lens element E5 has negative power, the fifth lens element object-side surface S9 is concave, and the fifth lens element image-side surface S10 is convex; the sixth lens element E6 has positive refractive power, the sixth lens element object-side surface S11 is convex, and the sixth lens element image-side surface S12 is concave; the seventh lens element E7 has negative power, the seventh lens object-side surface S13 is convex, and the seventh lens image-side surface S14 is concave. Filter E8 has a filter object side S15 and a filter image side S16. The light from the object passes through the surfaces in sequence and is finally imaged on the imaging plane S17.
Table seventeen shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example five, where the radius of curvature and the thickness are both in millimeters.
Table seventeen: detailed optical data for each lens in example five
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | All-round | All-round | ||
| S1 | Aspherical surface | 1.9738 | 0.6041 | 1.54/56.2 | 0.0659 |
| S2 | Aspherical surface | 5.8803 | 0.1000 | 8.3671 | |
| S3 | Aspherical surface | 3.2372 | 0.2100 | 1.64/23.5 | -0.0825 |
| S4 | Aspherical surface | 1.6145 | 0.1000 | -0.7667 | |
| S5 | Aspherical surface | 2.4358 | 0.6142 | 1.54/56.1 | -22.4227 |
| S6 | Aspherical surface | -23.7525 | 0.1000 | 50.0000 | |
| STO | Spherical surface | All-round | 0.6521 | ||
| S7 | Aspherical surface | 13.9778 | 0.2100 | 1.66/20.4 | 36.4447 |
| S8 | Aspherical surface | 9.7178 | 0.2921 | 49.3007 | |
| S9 | Aspherical surface | -9.3153 | 0.2100 | 1.64/23.5 | 7.5446 |
| S10 | Aspherical surface | -12.0893 | 0.1000 | 50.0000 | |
| S11 | Aspherical surface | 1.5792 | 0.2210 | 1.54/56.1 | -6.2875 |
| S12 | Aspherical surface | 2.1464 | 0.6300 | -6.2331 | |
| S13 | Aspherical surface | 3.5318 | 0.2400 | 1.54/56.1 | -0.1592 |
| S14 | Aspherical surface | 1.3355 | 0.2282 | -10.1785 | |
| S15 | Spherical surface | All-round | 0.2100 | 1.52/64.2 | |
| S16 | Spherical surface | All-round | 0.2783 | ||
| S17 | Spherical surface | All-round |
In this example, each lens may be an aspherical lens, and each aspherical surface type x is defined by the following formula:
wherein x is the distance rise from the aspheric surface vertex at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface,
(i.e., paraxial curvature c is the inverse of radius of curvature R in Table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface.
Table eighteen shows the high-order term coefficients of the respective aspherical surfaces that can be used for the respective aspherical lenses in this example.
Table eighteen: example five higher order coefficient of each aspherical surface
| Surface type | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 8.3173E-04 | -2.5876E-02 | 8.6644E-02 | -1.5755E-01 | 1.6950E-01 | -1.1318E-01 | 4.5730E-02 | -1.0197E-02 | 9.5285E-04 |
| S2 | 8.3038E-03 | 1.0012E-01 | -2.6336E-01 | 3.7279E-01 | -3.2350E-01 | 1.7175E-01 | -5.2666E-02 | 8.1257E-03 | -4.4148E-04 |
| S3 | -1.1703E-01 | 2.3669E-01 | -4.9661E-01 | 7.1834E-01 | -6.7303E-01 | 3.9945E-01 | -1.4454E-01 | 2.9141E-02 | -2.5162E-03 |
| S4 | -1.7340E-01 | 3.8138E-01 | -9.9714E-01 | 1.8268E+00 | -1.9869E+00 | 1.2211E+00 | -3.8574E-01 | 4.4778E-02 | 1.6708E-03 |
| S5 | 1.8451E-01 | -3.5803E-01 | 8.7903E-01 | -1.8072E+00 | 2.8051E+00 | -2.8926E+00 | 1.8061E+00 | -6.1080E-01 | 8.5468E-02 |
| S6 | -1.6983E-02 | 9.0945E-02 | -3.8364E-01 | 9.0590E-01 | -1.2250E+00 | 9.4162E-01 | -3.6910E-01 | 4.6397E-02 | 5.8992E-03 |
| S7 | -4.2561E-02 | -3.0891E-01 | 1.0805E+00 | -2.7719E+00 | 4.8623E+00 | -5.5745E+00 | 3.9416E+00 | -1.5541E+00 | 2.6083E-01 |
| S8 | -3.9331E-02 | -1.6339E-01 | 3.0813E-01 | -5.7905E-01 | 8.9086E-01 | -9.1575E-01 | 5.6967E-01 | -1.9407E-01 | 2.7867E-02 |
| S9 | 1.0390E-01 | -2.3336E-01 | 5.9734E-01 | -1.1745E+00 | 1.3380E+00 | -9.1302E-01 | 3.7477E-01 | -8.6656E-02 | 8.7158E-03 |
| S10 | -1.8328E-01 | 4.8801E-01 | -7.7880E-01 | 8.9255E-01 | -8.2993E-01 | 5.6543E-01 | -2.4486E-01 | 5.8423E-02 | -5.7998E-03 |
| S11 | -1.3559E-01 | 8.8338E-02 | -1.2172E-01 | 1.4871E-01 | -1.2534E-01 | 6.5492E-02 | -2.0170E-02 | 3.3478E-03 | -2.3014E-04 |
| S12 | 6.1241E-02 | -3.4545E-01 | 4.9934E-01 | -4.4933E-01 | 2.6332E-01 | -1.0002E-01 | 2.3690E-02 | -3.1625E-03 | 1.8035E-04 |
| S13 | -4.1061E-01 | 3.2386E-01 | -2.4240E-01 | 1.1056E-01 | -2.2889E-02 | -2.0710E-04 | 1.0870E-03 | -2.1060E-04 | 1.3589E-05 |
| S14 | -1.0448E-01 | 2.4220E-02 | 2.0150E-02 | -3.0230E-02 | 1.6831E-02 | -5.0134E-03 | 8.4021E-04 | -7.4502E-05 | 2.7059E-06 |
Table nineteenth shows the effective focal length F of the optical imaging lens in example five, the effective focal lengths F1 to F7 of the respective lenses, the distance TTL on the optical axis from the first lens object-side surface S1 to the imaging surface S17, the F-number Fno of the optical imaging lens, half ImgH of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and the maximum half field angle HFOV.
Table nineteen: parameters of optical imaging lens
| Parameter \ example | 5 |
| TTL(mm) | 5.00 |
| ImgH(mm) | 3.10 |
| Semi-FOV(°) | 35.0 |
| Fno | 1.89 |
| f(mm) | 4.10 |
| f1(mm) | 5.17 |
| f2(mm) | -5.30 |
| f3(mm) | 4.09 |
| f4(mm) | -49.23 |
| f5(mm) | -65.39 |
| f6(mm) | 9.66 |
| f7(mm) | -4.10 |
Table twenty shows the relationship of the optical imaging lens in example five, in which
The f/EPD is 1.59, the f/EPD is in the range of 1.4 to 1.98, and the larger aperture can be realized to increase the light inlet quantity on the premise of compressing the whole size of the lens and ensuring the normal yield of mass production, and the low-order aberration of the control system can be effectively balanced.
T23/T34 is 0.13, T23/T34 is in the range of 0.1 to 0.3, the aperture can be enlarged, and the light entering amount can be increased.
R11/f3 is 0.39, R11/f3 is in the range of 0.1 to 0.5, the optical sensitivities of the third lens E3 and the sixth lens E6 are reduced, so that the aberration in the range is reduced, and the imaging quality is improved
f2/f7 is 1.29, and f2/f7 is in the range of 1 to 1.6, so that the spherical aberration is controlled in a reasonable range to have better imaging effect.
(R12-R11)/(R12+ R11) ═ 0.15, (R12-R11)/(R12+ R11) is in the range of 0 to 0.5, avoiding the occurrence of an excessively large incident angle of the optical imaging lens, while the range of optical power of the optical imaging lens can be constrained to reduce coma.
Sigma CT/TD is 0.51, and sigma CT/TD is in the range of 0.3 to 0.8, so that the thickness of each lens is in a reasonable range relative to the length of the optical imaging lens, the size of the optical imaging lens is reduced, and the difficulty of manufacturing the lens is reduced.
R11/R14 is 1.18, and R11/R14 is in the range of 0.9 to 1.5, the optical sensitivity of the sixth lens E6 and the seventh lens E7 can be reduced.
SAG11/ET1 is 3.44, SAG11/ET1 is in the range of 3 to 3.6, the mass producibility of the first lens E1 is increased, and the first lens E1 is easy to assemble on the lens barrel.
The CT6/(T67+ CT7) is 0.25, and the CT6/(T67+ CT7) is in the range of 0.1 to 0.6, so that the sixth lens E6 and the seventh lens E7 are ensured not to be too thin to influence production, and the total length of the optical imaging lens is prevented from exceeding the manufacturing limit.
(f/f1) + (f/f3) ═ 1.79, (f/f1) + (f/f3) is in the range of 1.3 to 2, which is advantageous for reducing the spherical aberration and curvature of field of the first lens E1 and the third lens E3.
The total length of the air space is reasonably restricted, so that the lens structure is more compact, and the effective focal length and the total length of the optical imaging lens are still in a reasonable range while the large aperture is realized.
|SAG71*T67|/ImgH2＝0.06，|SAG71*T67|/ImgH2In the range of 0.04 to 0.09, the ratio of the sagittal height of the seventh lens object-side surface S14 to the air space between the sixth lens E6 and the seventh lens E7 with respect to the image height is defined, so that the seventh lens E7 can be more easily processed, and the total length of the optical imaging lens can be reduced accordingly.
Table twenty: example five relations of optical imaging lens
| Conditional \ example | 5 |
| f/EPD | 1.59 |
| T23/T34 | 0.13 |
| R11/f3 | 0.39 |
| f2/f7 | 1.29 |
| (R12-R11)/(R12+R11) | 0.15 |
| ∑CT/TD | 0.51 |
| R11/R14 | 1.18 |
| SAG11/ET1 | 3.44 |
| CT6/(T67+CT7) | 0.25 |
| (f/f1)+(f/f3) | 1.79 |
| EPD/∑AT | 1.31 |
| |SAG71*T67|/ImgH^2 | 0.06 |
In this example, the optical imaging lens has an optical axis length of 5.0mm from the first lens object-side surface S1 to the imaging surface S17, an effective focal length of 4.1mm, an image height of 3.10mm, a maximum half angle of view of 35 degrees, and an aperture value of 1.89. This example has guaranteed great light ring when guaranteeing the miniaturization of optical imaging lens, can acquire more light inlet volume, reduces optical aberration when light is not enough, promotes the image acquisition quality, acquires stable formation of image effect. Note that the larger the aperture value, the smaller the aperture, and the smaller the aperture value, the larger the aperture.
Fig. 22 shows an on-axis chromatic aberration curve on the optical imaging lens of example five, which shows that the converging focal points of the light rays of different wavelengths after passing through the optical system are deviated, so that the image focal planes of the light rays of different wavelengths at the time of final imaging cannot coincide, and the polychromatic light spreads to form chromatic dispersion. Fig. 23 shows astigmatism curves of the optical imaging lens of example five, which represent meridional field curvature and sagittal field curvature. Fig. 24 shows distortion curves of the optical imaging lens of example five, which represent distortion magnitude values in the case of different angles of view. Fig. 25 shows a chromatic aberration of magnification curve of the optical imaging lens of example five, which represents a phase difference of different image heights on the imaging plane after light passes through the optical imaging lens. As can be seen from fig. 22 to 25, the optical imaging lens according to example five is suitable for portable electronic products, has a large aperture and good imaging quality.
Example six
As shown in fig. 26, the optical imaging lens includes, in order from an object side to an image side along an optical axis: the lens system comprises a first lens E1, a second lens E2, a third lens E3, a diaphragm STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.
The first lens E1 has positive focal power, the first lens object-side surface S1 is convex, and the first lens image-side surface S2 is concave; the second lens E2 has negative power, the second lens object-side surface S3 is convex, and the second lens image-side surface S4 is concave; the third lens E3 has positive focal power, the third lens object-side surface S5 is convex, and the third lens image-side surface S6 is convex; the fourth lens element E4 has negative power, the fourth lens element object-side surface S7 is concave, and the fourth lens element image-side surface S8 is concave; the fifth lens element E5 has positive power, the fifth lens element object-side surface S9 is concave, and the fifth lens element image-side surface S10 is convex; the sixth lens element E6 has positive refractive power, the sixth lens element object-side surface S11 is convex, and the sixth lens element image-side surface S12 is concave; the seventh lens element E7 has negative power, the seventh lens object-side surface S13 is convex, and the seventh lens image-side surface S14 is concave. Filter E8 has a filter object side S15 and a filter image side S16. The light from the object passes through the surfaces in sequence and is finally imaged on the imaging plane S17.
Table twenty one shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the optical imaging lens of example six, where the unit of the radius of curvature and the thickness are both millimeters.
Table twenty one: detailed optical data for each lens in example six
In this example, each lens may be an aspherical lens, and each aspherical surface type x is defined by the following formula:
wherein x is the distance rise from the aspheric surface vertex at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface,
(i.e., paraxial curvature c is the inverse of radius of curvature R in Table 1 above); k is the conic coefficient (given in table 1); ai is the correction coefficient of the i-th order of the aspherical surface.
Table twenty-two shows the high-order term coefficients of the respective aspherical surfaces that can be used for the respective aspherical lenses in this example.
TABLE twenty-two: example six higher order coefficient of each aspherical surface
| Surface type | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | 2.7370E-04 | -8.6268E-03 | 3.4395E-02 | -8.7571E-02 | 1.2075E-01 | -9.9514E-02 | 4.7838E-02 | -1.2278E-02 | 1.2719E-03 |
| S2 | 1.4486E-02 | 7.7289E-02 | -2.9229E-01 | 5.4331E-01 | -6.0599E-01 | 4.1411E-01 | -1.6669E-01 | 3.5879E-02 | -3.1897E-03 |
| S3 | -1.4862E-01 | 3.4349E-01 | -9.4393E-01 | 1.9046E+00 | -2.5201E+00 | 2.1083E+00 | -1.0670E+00 | 2.9682E-01 | -3.4725E-02 |
| S4 | -1.7636E-01 | 3.2376E-01 | -6.2508E-01 | 4.7765E-01 | 1.3959E+00 | -4.2384E+00 | 4.7587E+00 | -2.4970E+00 | 5.0757E-01 |
| S5 | 2.0642E-01 | -4.7138E-01 | 1.3884E+00 | -3.8830E+00 | 8.2461E+00 | -1.1331E+01 | 9.2517E+00 | -4.0324E+00 | 7.1797E-01 |
| S6 | -3.5996E-02 | 1.4068E-01 | -8.2234E-01 | 2.6950E+00 | -5.1301E+00 | 5.7879E+00 | -3.6832E+00 | 1.1399E+00 | -1.0116E-01 |
| S7 | -1.1287E-01 | -1.4181E-01 | 7.3556E-01 | -2.6350E+00 | 6.2007E+00 | -9.3425E+00 | 8.6478E+00 | -4.4727E+00 | 9.8583E-01 |
| S8 | -8.3740E-02 | -1.6051E-01 | 5.2135E-01 | -1.3664E+00 | 2.3674E+00 | -2.6265E+00 | 1.8080E+00 | -7.0450E-01 | 1.1805E-01 |
| S9 | 1.0544E-01 | -2.3439E-01 | 4.4643E-01 | -6.5096E-01 | 4.2151E-01 | 8.5142E-02 | -3.1315E-01 | 1.8553E-01 | -3.8464E-02 |
| S10 | -1.4158E-01 | 2.4724E-01 | -2.3505E-01 | 1.4549E-01 | -1.0002E-01 | 8.4195E-02 | -4.9075E-02 | 1.4684E-02 | -1.7036E-03 |
| S11 | -1.6324E-01 | 1.5486E-01 | -2.6623E-01 | 3.2158E-01 | -2.7256E-01 | 1.5431E-01 | -5.4376E-02 | 1.0651E-02 | -8.7717E-04 |
| S12 | -3.7345E-03 | -1.1558E-01 | 1.3705E-01 | -1.0093E-01 | 4.9064E-02 | -1.5348E-02 | 2.9276E-03 | -3.0619E-04 | 1.3211E-05 |
| S13 | -3.5555E-01 | 2.9012E-01 | -1.8222E-01 | 8.7287E-02 | -2.9971E-02 | 7.2247E-03 | -1.2041E-03 | 1.2753E-04 | -6.4245E-06 |
| S14 | -1.7755E-01 | 1.3998E-01 | -1.0020E-01 | 5.8302E-02 | -2.5501E-02 | 7.5509E-03 | -1.3849E-03 | 1.4044E-04 | -5.9920E-06 |
Table twenty-three shows the effective focal length F of the optical imaging lens in example six, the effective focal lengths F1 to F7 of the respective lenses, the distance TTL on the optical axis from the first lens object-side surface S1 to the imaging surface S17, the F-number Fno of the optical imaging lens, half ImgH of the diagonal length of the effective pixel region on the imaging surface of the optical imaging lens, and the maximum half field angle HFOV.
Table twenty three: parameters of optical imaging lens
| Parameter \ example | 6 |
| TTL(mm) | 5.00 |
| ImgH(mm) | 3.10 |
| Semi-FOV(°) | 35.0 |
| Fno | 1.89 |
| f(mm) | 4.20 |
| f1(mm) | 4.54 |
| f2(mm) | -5.30 |
| f3(mm) | 4.60 |
| f4(mm) | -16.03 |
| f5(mm) | 76.68 |
| f6(mm) | 12.93 |
| f7(mm) | -4.90 |
Table twenty-four shows the relationship of the optical imaging lens in example six, in which
The f/EPD is 1.89, the f/EPD is in the range of 1.4 to 1.98, and the larger aperture can be realized to increase the light inlet quantity on the premise of compressing the whole size of the lens and ensuring the normal yield of mass production, and the low-order aberration of the system can be effectively balanced and controlled.
T23/T34 is 0.15, T23/T34 is in the range of 0.1 to 0.3, the aperture can be enlarged, and the light entering amount can be increased.
R11/f3 is 0.33, R11/f3 is in the range of 0.1 to 0.5, the optical sensitivities of the third lens E3 and the sixth lens E6 are reduced, so that the aberration in the range is reduced, and the imaging quality is improved
f2/f7 is 1.08, and f2/f7 is in the range of 1 to 1.6, so that the spherical aberration is controlled in a reasonable range to have better imaging effect.
(R12-R11)/(R12+ R11) ═ 0.08, (R12-R11)/(R12+ R11) is in the range of 0 to 0.5, avoiding the occurrence of an excessively large incident angle of the optical imaging lens, while the range of optical power of the optical imaging lens can be constrained to reduce coma.
Sigma CT/TD is 0.53, and sigma CT/TD is in the range of 0.3 to 0.8, so that the thickness of each lens is in a reasonable range relative to the length of the optical imaging lens, the size of the optical imaging lens is reduced, and the difficulty of manufacturing the lens is reduced.
R11/R14 is 0.97, and R11/R14 is in the range of 0.9 to 1.5, which can reduce the optical sensitivity of the sixth lens E6 and the seventh lens E7.
SAG11/ET1 is 3.42, SAG11/ET1 is in the range of 3 to 3.6, the mass producibility of the first lens E1 is increased, and the first lens E1 is easily assembled to the lens barrel.
The CT6/(T67+ CT7) is 0.32, and the CT6/(T67+ CT7) is in the range of 0.1 to 0.6, so that the sixth lens E6 and the seventh lens E7 are ensured not to be too thin to influence production, and the total length of the optical imaging lens is prevented from exceeding the manufacturing limit.
(f/f1) + (f/f3) ═ 1.84, (f/f1) + (f/f3) in the range of 1.3 to 2, is advantageous for reducing the spherical aberration and curvature of field of the first lens E1 and the third lens E3.
The EPD/SIGMA AT is 1.17, the total length of the air space is reasonably restricted, so that the lens structure is more compact, and the effective focal length and the total length of the optical imaging lens are still in a reasonable range while the large aperture is realized.
|SAG71*T67|/ImgH2＝0.05，|SAG71*T67|/Im gH2In the range of 0.04 to 0.09, the ratio of the sagittal height of the seventh lens object-side surface S14 to the air space between the sixth lens E6 and the seventh lens E7 with respect to the image height is defined, so that the seventh lens E7 can be more easily processed, and the total length of the optical imaging lens can be reduced accordingly.
Table twenty-four: relations of optical imaging lens in example six
| Conditional \ example | 6 |
| f/EPD | 1.89 |
| T23/T34 | 0.15 |
| R11/f3 | 0.33 |
| f2/f7 | 1.08 |
| (R12-R11)/(R12+R11) | 0.08 |
| ∑CT/TD | 0.53 |
| R11/R14 | 0.97 |
| SAG11/ET1 | 3.42 |
| CT6/(T67+CT7) | 0.32 |
| (f/f1)+(f/f3) | 1.84 |
| EPD/∑AT | 1.17 |
| |SAG71*T67|/ImgH^2 | 0.05 |
In the example, the optical imaging lens has an optical axis length of 5.0mm from the first lens object-side surface S1 to the imaging surface S17, an effective focal length of 4.2mm, an image height of 3.10mm, a maximum half angle of view of 35 degrees, and an aperture value of 1.89. This example has guaranteed great light ring when guaranteeing the miniaturization of optical imaging lens, can acquire more light inlet volume, reduces optical aberration when light is not enough, promotes the image acquisition quality, acquires stable formation of image effect. Note that the larger the aperture value, the smaller the aperture, and the smaller the aperture value, the larger the aperture.
Fig. 27 shows an on-axis chromatic aberration curve on the optical imaging lens of example six, which indicates that the converging focal points of the light rays of different wavelengths after passing through the optical system are deviated, so that the image focal planes of the light rays of different wavelengths at the time of final imaging cannot coincide, and the polychromatic light spreads to form chromatic dispersion. Fig. 28 shows astigmatism curves representing meridional field curvature and sagittal field curvature of the optical imaging lens of example six. Fig. 29 shows distortion curves of the optical imaging lens of example six, which represent distortion magnitude values in the case of different angles of view. Fig. 30 shows a chromatic aberration of magnification curve of the optical imaging lens of example six, which represents a phase difference of different image heights on the imaging plane after light passes through the optical imaging lens. As can be seen from fig. 27 to 30, the optical imaging lens according to example six is suitable for portable electronic products, has a large aperture and good imaging quality.
It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An optical imaging lens, comprising, in order from an object side to an image side:
a first lens having a positive optical power;
a second lens having a negative optical power;
a third lens having a positive optical power;
a fourth lens having an optical power;
a fifth lens having optical power;
the sixth lens with focal power, the object-side surface of the sixth lens is a convex surface, and the image-side surface of the sixth lens is a concave surface;
the seventh lens with negative focal power, the image side surface of the seventh lens is a concave surface;
wherein 1.4 < f/EPD < 1.98 is satisfied between an entrance pupil diameter EPD of the optical imaging lens and an effective focal length f of the optical imaging lens, and 0.1 < T23/T34 < 0.3 is satisfied between an air interval T23 on an optical axis between the second lens and the third lens and an air interval T34 on the optical axis between the third lens and the fourth lens.
2. The optical imaging lens of claim 1, characterized in that 0.1 < R11/f3 < 0.5 is satisfied between the radius of curvature R11 of the object side of the sixth lens and the effective focal length f3 of the third lens.
3. The optical imaging lens of claim 1, characterized in that 1 < f2/f7 < 1.6 is satisfied between the effective focal length f2 of the second lens and the effective focal length f7 of the seventh lens.
4. The optical imaging lens of claim 1, wherein 0 < (R12-R11)/(R12+ R11) < 0.5 is satisfied between the radius of curvature R12 of the image-side surface of the sixth lens and the radius of curvature R11 of the object-side surface of the sixth lens.
5. The optical imaging lens according to claim 1, wherein a sum Σ CT of central thicknesses on the optical axis of the first lens to the seventh lens, and a distance TD on the optical axis between a first lens object-side surface and a seventh lens image-side surface satisfies 0.3 < Σct/TD < 0.8.
6. The optical imaging lens of claim 1, wherein the radius of curvature R11 of the object-side surface of the sixth lens and the radius of curvature R14 of the image-side surface of the seventh lens satisfy 0.9 < R11/R14 < 1.5.
7. The optical imaging lens of claim 1, wherein an on-axis distance between an intersection of a first lens object-side surface and the optical axis and an effective radius vertex of the first lens object-side surface is SAG11, an edge thickness of the first lens is ET1, and 3 < SAG11/ET1 < 3.6 is satisfied between SAG11 and ET 1.
8. The optical imaging lens according to claim 1, characterized in that 0.1 < CT6/(T67+ CT7) < 0.6 is satisfied between a center thickness CT6 of the sixth lens on the optical axis, an air interval T67 of the sixth lens and the seventh lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis.
9. The optical imaging lens of claim 1, wherein 1.3 < (f/f1) + (f/f3) < 2 is satisfied between the effective focal length f of the optical imaging lens, the effective focal length f1 of the first lens and the effective focal length f3 of the third lens.
10. An optical imaging lens, comprising, in order from an object side to an image side:
a first lens having a positive optical power;
a second lens having an optical power;
a third lens having a positive optical power;
a fourth lens having an optical power;
a fifth lens having optical power;
a sixth lens having optical power;
the seventh lens with negative focal power, the object side surface of the seventh lens is a convex surface, and the image side surface of the seventh lens is a concave surface;
wherein a distance SAG71 on the optical axis between an intersection point of the seventh lens object-side surface and the optical axis to an effective radius vertex of the seventh lens object-side surface, an air space T67 on the optical axis between the sixth lens and the seventh lens, and a half ImgH of a diagonal length of an effective pixel region on an imaging surface of the optical imaging lens satisfy 0.04 < | SAG71 |/T67 |/ImgH2＜0.09。
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